#include <REG51.H>
#define uchar unsigned char
sbit beepIO=P2^5; 
uchar m,n;
uchar code T[49][2]= {{0,0},
    {0xF9,0x1F},{0xF9,0x82},{0xF9,0xDF},{0xFA,0x37},{0xFA,0x8A},{0xFA,0xD8},{0xFB,0x23},{0xFB,0x68},{0xFB,0xAA},{0xFB,0xE9},{0xFC,0x24},{0xFC,0x5B},
    {0xFC,0x8F},{0xFC,0xC1},{0xFC,0xEF},{0xFD,0x1B},{0xFD,0x45},{0xFD,0x6C},{0xFD,0x91},{0xFD,0xB4},{0xFD,0xD5},{0xFD,0xF4},{0xFE,0x12},{0xFE,0x2D},
    {0xFE,0x48},{0xFE,0x60},{0xFE,0x78},{0xFE,0x86},{0xFE,0xA3},{0xFE,0xB6},{0xFE,0xC9},{0xFE,0xDA},{0xFF,0xEB},{0xFE,0xFA},{0xFF,0x09},{0xFF,0x17},
    {0xFF,0x24},{0xFF,0x30},{0xFF,0x3C},{0xFF,0x47},{0xFF,0x51},{0xFF,0x5B},{0xFF,0x64},{0xFF,0x6D},{0xFF,0x75},{0xFF,0x7D},{0xFF,0x84},{0xFF,0x8B}
};
uchar code music[][2]= {{0,4}, 
    {0,1},{1,1},{3,1},{5,1},{6,1},{8,1},{10,1},{12,1},{13,1},
    {0,1},{13,1},{15,1},{17,1},{18,1},{20,1},{22,1},{24,1},{25,1},
    {0,1},{25,1},{27,1},{29,1},{30,1},{32,1},{34,1},{36,1},{37,1},
    {0,1},{37,1},{39,1},{41,1},{42,1},{44,1},{46,1},{48,2},
    {0,4},{24,4},{24,4},{21,4},{19,4},{21,4},{14,8},{19,4},{21,4},{24,4},{21,4},{19,16},
    {0,4},{24,4},{24,4},{21,4},{19,4},{21,4},{12,8},{19,4},{21,4},{24,4},{19,4},{17,16},
    {0,4},{17,4},{19,4},{21,4},{24,4},{26,4},{24,4},{22,4},{24,4},{21,4},{21,4},{19,4},{19,16},
    {0,4},{17,4},{19,4},{17,4},{17,4},{19,4},{17,4},{19,4},{19,4},{21,8},{24,4},{21,4},{21,12},
    {0,4},{24,4},{24,4},{21,4},{19,4},{21,4},{14,8},{19,4},{21,4},{24,4},{21,4},{19,16}, 
    {0,4},{24,4},{24,4},{21,4},{19,4},{21,4},{12,8},{19,4},{21,4},{24,4},{19,4},{17,16}, 
    {0,4},{17,4},{19,4},{21,4},{24,4},{26,4},{24,4},{22,4},{24,4},{21,4},{21,4},{19,4},{19,12},
    {12,4},{21,8},{19,8},{19,4},{17,20}, 
    {0xFF,0xFF}
}; 


void delay(uchar p) 
{
    uchar i,j; 
    for(; p>0; p--) 
        for(i=181; i>0; i--) 
            for(j=181; j>0; j--);
}




void T0_int() interrupt 1
{
    beepIO=!beepIO; 
    TH0=T[m][0];
    TL0=T[m][1];

}


void main()
{
    uchar i=0; 
    TMOD=0x01;
    EA=1;
    ET0=1; 
    while(1) 
    {
        m=music[i][0]; 
        n=music[i][1]; 
        if(m==0x00) 
        {
            TR0=0;
            delay(n);
            i++;
        } 
        else if(m==0xFF) 
        {
            TR0=0;
            delay(30);
            i=0;
        } 
        else if(m==music[i+1][0]) 
        {
            TR0=1;
            delay(n);
            TR0=0;
            i++;
        } 
        else
        {
            TR0=1;
            delay(n);
            i++;
        }
    }
}
